Measurement of the drift velocity and transverse diffusion of electrons in liquid xenon with the EXO-200 detector

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31 Scopus citations

Abstract

The EXO-200 Collaboration is searching for neutrinoless double β decay using a liquid xenon (LXe) time projection chamber. This measurement relies on modeling the transport of charge deposits produced by interactions in the LXe to allow discrimination between signal and background events. Here we present measurements of the transverse diffusion constant and drift velocity of electrons at drift fields between 20 V/cm and 615 V/cm using EXO-200 data. At the operating field of 380 V/cm EXO-200 measures a drift velocity of 1.705-0.010+0.014mm/μs and a transverse diffusion coefficient of 55±4cm2/s.

Original languageEnglish
Article number025502
JournalPhysical Review C
Volume95
Issue number2
DOIs
StatePublished - Feb 14 2017

Bibliographical note

Publisher Copyright:
© 2017 American Physical Society.

Funding

We also gratefully acknowledge the KARMEN collaboration for supplying the cosmic-ray veto detectors, and the WIPP for their hospitality. EXO-200 is supported by DOE and NSF in the United States, NSERC in Canada, SNF in Switzerland, IBS in Korea, RFBR in Russia, DFG Cluster of Excellence Universe in Germany, and CAS and ISTCP in China. EXO-200 data analysis and simulation uses resources of the National Energy Research Scientific Computing Center (NERSC).

FundersFunder number
DFG Cluster of Excellence Universe in Germany
National Science Foundation Arctic Social Science Program
U.S. Department of Energy EPSCoR
College of Arts and Sciences, University of Nebraska-Lincoln
Natural Sciences and Engineering Research Council of Canada
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Russian Foundation for Basic Research
International Science and Technology Cooperation Programme

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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